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Development of an efficient statistical volumes of fluid-Lagrangian particle tracking coupling method

Grosshans, Holger LU ; Szász, Robert-Zoltán LU and Fuchs, Laszlo LU (2014) In International Journal for Numerical Methods in Fluids 74(12). p.898-918
Abstract
The breakup of a liquid jet into irregular liquid structures and droplets leading to the formation of a dilute spray has been simulated numerically. To overcome the shortcomings of certain numerical methods in specific flow regimes, a combined approach has been chosen. The intact liquid core, its primary breakup and the dense spray regime are simulated using the volumes of fluid (VOF) method in combination with LES, whereas the Lagrangian particle tracking (LPT) approach in the LES context is applied to the dilute spray regime and the secondary breakup of droplets. A method has been developed to couple both simulation types on a statistical basis. This statistical coupling approach (SCA) reflects the dominating physical mechanisms of the... (More)
The breakup of a liquid jet into irregular liquid structures and droplets leading to the formation of a dilute spray has been simulated numerically. To overcome the shortcomings of certain numerical methods in specific flow regimes, a combined approach has been chosen. The intact liquid core, its primary breakup and the dense spray regime are simulated using the volumes of fluid (VOF) method in combination with LES, whereas the Lagrangian particle tracking (LPT) approach in the LES context is applied to the dilute spray regime and the secondary breakup of droplets. A method has been developed to couple both simulation types on a statistical basis. This statistical coupling approach (SCA) reflects the dominating physical mechanisms of the two-phase flow in each regime to a high degree. The main benefit of the SCA is computational efficiency as compared with the more straightforward approach where one follows each structure, denoted here as the direct coupling approach. The computational benefits stem from the reduction of computational time since the VOF simulation is run only until statistical convergence and not during the whole spray development. A second benefit using the SCA is the possibility to use the stochastic parcel method in the LPT simulation whereby a large number of droplets may be handled. The coupling approach is applied to the atomization of a fuel jet in a high pressure chamber, demonstrating the gain of efficiency of the SCA as compared with direct coupling approach. Copyright © 2014 The Authors. International Journal for Numerical Methods in Fluids published by John Wiley & Sons Ltd. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
International Journal for Numerical Methods in Fluids
volume
74
issue
12
pages
898 - 918
publisher
John Wiley & Sons
external identifiers
  • wos:000332951700003
  • scopus:84896737954
ISSN
1097-0363
DOI
10.1002/fld.3879
language
English
LU publication?
yes
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df5029bf-5bd7-48ef-8e62-8bcbd75c1aa7 (old id 4422879)
alternative location
http://onlinelibrary.wiley.com/doi/10.1002/fld.3879/pdf
date added to LUP
2014-04-30 14:00:41
date last changed
2017-06-11 03:04:32
@article{df5029bf-5bd7-48ef-8e62-8bcbd75c1aa7,
  abstract     = {The breakup of a liquid jet into irregular liquid structures and droplets leading to the formation of a dilute spray has been simulated numerically. To overcome the shortcomings of certain numerical methods in specific flow regimes, a combined approach has been chosen. The intact liquid core, its primary breakup and the dense spray regime are simulated using the volumes of fluid (VOF) method in combination with LES, whereas the Lagrangian particle tracking (LPT) approach in the LES context is applied to the dilute spray regime and the secondary breakup of droplets. A method has been developed to couple both simulation types on a statistical basis. This statistical coupling approach (SCA) reflects the dominating physical mechanisms of the two-phase flow in each regime to a high degree. The main benefit of the SCA is computational efficiency as compared with the more straightforward approach where one follows each structure, denoted here as the direct coupling approach. The computational benefits stem from the reduction of computational time since the VOF simulation is run only until statistical convergence and not during the whole spray development. A second benefit using the SCA is the possibility to use the stochastic parcel method in the LPT simulation whereby a large number of droplets may be handled. The coupling approach is applied to the atomization of a fuel jet in a high pressure chamber, demonstrating the gain of efficiency of the SCA as compared with direct coupling approach. Copyright © 2014 The Authors. International Journal for Numerical Methods in Fluids published by John Wiley & Sons Ltd.},
  author       = {Grosshans, Holger and Szász, Robert-Zoltán and Fuchs, Laszlo},
  issn         = {1097-0363},
  language     = {eng},
  number       = {12},
  pages        = {898--918},
  publisher    = {John Wiley & Sons},
  series       = {International Journal for Numerical Methods in Fluids},
  title        = {Development of an efficient statistical volumes of fluid-Lagrangian particle tracking coupling method},
  url          = {http://dx.doi.org/10.1002/fld.3879},
  volume       = {74},
  year         = {2014},
}